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Hunan Gri Instrument Co., Ltd

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Yuelu Dist., Changsha, Hunan, China (Mainland)

Telephone:0731-88860558

Civil construction indoor air quality national standards

GB50325-2010 indoor environmental contaminants testing standards partly explainalation
 
1、Civil engineering indoor air formaldehyde detection methods should be consistent with the national standard "method for determination of formaldehyde in the air in public places" GB/T18204.26--2000 provisions. 
2、civil engineering indoor air formaldehyde detection, scene detection method can be used, the instrument used in the 0-0.60mg / m measurement range of uncertainty should be less than 5%. 
3 、the benzene detection methods, civil engineering indoor air should be in line with national standards, "the provisions of the harmful gases in the air of residential areas health inspection standard methods - gas chromatography GB 11737-89. 
4、ammonia civil engineering indoor air testing, national standards may be used for determination of ammonia in the air of public places method GB/T18204.25-2000 or national standards, "Air Quality - Determination of ammonia ion selective electrode method GB / T 14669 -93 measured. In the event of a dispute should be the national standard "method of determination of ammonia in the air of public places - indophenol blue spectrophotometry" GB/T18204.25-2000 the measurement results shall prevail. 
5、Civil engineering indoor air of total volatile organic compounds (TVOC) detection method, shall comply with the provisions of Appendix E of this specification. 
6、Civil engineering acceptance sampling representative room indoor environmental pollutant concentrations, the number of sampling shall not be less than 5% and not less than 3; less than 3 Total number of rooms should be fully detected. 
7、the acceptance of civil engineering, where the showroom indoor environmental pollutants concentration detector test results are satisfactory, sampling half the number of, and shall not be less than three. 
8、 the acceptance of civil engineering, indoor environmental pollutant concentration detection point should be room size settings: 
① the room usable area is less than 50m, set a detection point; 
Of two detection the ② room area of 50 - 100 m; 
③ rooms use of an area greater than 100 m, provided 3-5 of detection points; 
9、when the room has two or more detection point, the average of the test results shall be taken as the points as the detection value of the room. 
10、the acceptance of civil engineering, environmental pollutants concentration field detection point should be away from the inner wall of not less than 0.5m, from the ground floor height of 0.8-1.5m. Detection point should be evenly distributed to avoid the ventilation ducts and vents. 
11、civil engineering indoor environmental free formaldehyde, benzene, ammonia, total volatile organic compounds (TVOC) concentration detector, on civil engineering centralized air-conditioning, in the conditions of the normal operation of the air conditioning; natural ventilation civil engineering, testing external doors and windows closed after 1h. 
12、in the detection of formaldehyde, ammonia, benzene, TVOC sampling, fixed furniture decoration works, should maintain the state of normal use. 
13、When the indoor environmental pollutants concentration test results comply with the provisions of this specification can be judged the engineering indoor environmental quality standards. 
14、 indoor environmental quality civil engineering unqualified acceptance, non-put into use. 
15、 the acceptance of civil engineering, the need for indoor environmental pollutants concentration detection. The test results shall comply with the GB50325-2010 standard. 
16、This specification applies to new construction, expansion and renovation of civil engineering indoor environmental pollution control, does not apply to industrial construction projects, warehousing, construction works, structures and room with special purification hygiene requirements. 
Note: The procedures referred to indoor environmental pollution of indoor environmental pollutants means of building materials and decoration materials. Civil engineering after delivery, non-building decoration materials, indoor environmental pollution, does not belong to the scope of the authority control. 
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